47235581 has 2 divisors, whose sum is σ = 47235582. Its totient is φ = 47235580.

The previous prime is 47235563. The next prime is 47235619. The reversal of 47235581 is 18553274.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27352900 + 19882681 = 5230^2 + 4459^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47235581 is a prime.

It is a super-2 number, since 2×47235581² = 4462400224815122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47235511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23617790 + 23617791.

It is an arithmetic number, because the mean of its divisors is an integer number (23617791).

Almost surely, 2^47235581 is an apocalyptic number.

It is an amenable number.

47235581 is a deficient number, since it is larger than the sum of its proper divisors (1).

47235581 is an equidigital number, since it uses as much as digits as its factorization.

47235581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33600, while the sum is 35.

The square root of 47235581 is about 6872.8146344856. The cubic root of 47235581 is about 361.4845614497.

The spelling of 47235581 in words is "forty-seven million, two hundred thirty-five thousand, five hundred eighty-one".